Mail Archives: cygwin/2001/09/23/17:05:36
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Hello all,
After the overwhelming display of interest for my last mail on this =
subject (which had gone completely unnoticed as far as I can tell), I =
have patched up the patch I sent earlier to take care of a lacking =
feature.
Much of my original mail is still valid, so I'm re-posting:
-- BEGIN RE-POST --
> On Wed, Sep 19, 2001 at 04:11:52PM -0300, salvador wrote:
>> 1) "ls -la /" doesn't show any cygdrive directory. Note it could=20
>> be solved in the same way UNIX solves the /proc stuff, just mounting
>> over an existent directory a fake one.
>> 2) "ls -la /cygdrive" doesn't work.
> Correct.
> If you'd like to correct this, patches will be, as always,=20
> gratefully accepted.
I saw this, it itched me, so I'm attaching a patch :)
The patch I'm attaching is against the source 'ls.c' as found in=20
fileutils-4.1-1. It introduces three methods, of which one is called:=20
ls-cygwin-loop(). It is called whenever needed.
I've *only* tested this on a Win98 platform, but I don't think NT=20
changes anything in this case (I don't have any NT platforms here, so I=20
can't test them).
Here's how it works:
$ ls -la /
(..)
?--------- 0 0 Sigma 0 Jan 1 1970 cygdrive
(..)
Note it only shows you that cygdrive exists. As there is no "magic dir"=20
filetype, and it's not a real directory, I'm not showing it as one. My=20
patch only does anything when there *is* no real directory - if it comes =
through a stat() call, it is not handled.
$ ls -la /cygdrive/
?--------- 0 0 Sigma 0 Jan 1 1970 c
?--------- 0 0 Sigma 0 Jan 1 1970 d
?--------- 0 0 Sigma 0 Jan 1 1970 p
?--------- 0 0 Sigma 0 Jan 1 1970 u
Note that 'ls -la /cygdrive' *only* shows:
?--------- 0 0 Sigma 0 Jan 1 1970 cygdrive
The patch works regardless of the cygdrive setting, but does=20
(regrettably) not show the mounted drives if the cygdrive setting is=20
'/' and -an 'ls -la /' is done. I guess I should fix this, but the=20
problem is that the mounted drives come through a stat() call as a=20
directory, so I don't know whether or not they're really there -=20
ideas would help.
Everything where displaying etc. is concerned is handled by the old code =
- my code only adds stuff to the list and does so conservatively (so it=20
does not, for example, show the /usr/bin mount when an ls -la /usr is=20
done, unless the directory is really there, in which case ls would show=20
it anyway. (This is to avoid duplicates in the file list).
I lifted some code from mount - code used to see what mounts exist, and=20
what the cygdrive prefix is.. I've surrounded those by copyright notices =
attributing it to mount & Cygnus. The rest is my own (but I'm quite=20
willing to sign it over, if it's significant enough for any signatures:=20
I'm no lawyer, so I'm being conservative - this, ofcourse, only if it=20
proves useful enough to apply to ls..).
All code is surrounded by the magic __CYGWIN__ ifdefs - so no other=20
platforms should be affected at all. (However, I don't know how MinGW32=20
handles this, or how this goes along with the -mno-cygwin flag)
--- END RE-POST ---
In addition to this, my former patch didn't handle relative directories=20
(at all). I.e. running "ls ../../../.." from the "/usr/src/fileutils-
4.1-1/src" directory didn't show the /cygdrive magic dir, while "ls /"=20
did. This has been fixed by expanding the path as handled by the patch=20
to the full POSIX path.
Once again: this patch has *only* been tested on my development machine, =
because I do not have any other configurations available here. Please,=20
if you have other configurations, feel free to test it - it's only=20
prudent.
I hope this will be helpful (and won't go unnoticed this time) :)
Greetz!
Ronald
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